JPS6077776A - Gut - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a racket made of synthetic wood that is used for rackets for tennis, domino, and ska-sauce.

Hitherto, high-strength fibers have been widely used as strings for rackets and seats in the various basketball games mentioned above, and in recent years, especially in recent years, materials have been used to improve the slippage between the ball and the string surface used in the batting lid. In order to prevent this phenomenon, the second υ is a synthetic resin monofilament core wire. Guttu, which is made by spirally winding different thin synthetic resin monofilaments, is preferably used. however,
These guts have a finely roughened surface, which can prevent the ball from slipping, but since their cross-sectional shape is essentially a perfect circle, the vertical and horizontal directions when stretched on a racket are The contact area at the intersection of guts is small,
Moreover, since they intersect with considerable high tension,
There are inherent problems such as the vertical and horizontal guts digging into each other, and the unexpected situation where the guts are cut off at the intersection due to the phenomenon of misalignment of the guts when hitting the ball or a momentary impact when hitting the ball. , there is a strong demand for improvement measures.

The present invention was made with the main purpose of particularly improving the above-mentioned problems, and the contact area of the vertical and horizontal guts at the intersection is larger than that of conventional guts whose cross-sectional shape is substantially a perfect circle. This product provides guts with excellent abrasion resistance and impact resistance that are resistant to deformation due to biting. It is characterized by a large contact area between the guts at the vertical and horizontal intersections.

Embodiments of the present invention will be explained below based on drawings showing embodiments of the present invention. FIGS. 1 and 2 show a gut with an elliptical cross section, and a synthetic resin monofilament with an elliptical cross section, for example, a high-strength monofilament. A large number of aligned thin nylon monofilaments (2) (2) are spirally wound around the outer periphery of a nylon monofilament core wire (1) in a double J- shape with an adhesive (3) interposed therebetween, More preferably, a resin coating (4) is applied to the surface to form a gut (5) having an oval cross section, and FIG. 3 shows two nylon monofilament cores m (la) (l
a) are aligned, the triangular groove formed by both X-rays (Ia) (Ia) is filled with adhesive (3a), and the outer periphery is covered with a large number of thin nylon monofilaments (2) as in the above example. (2) is glued with corrugated nails and a resin coating (4) is applied to the surface to form a gut (5) having an oval cross section.

The cross section of the rack h (5) as described above is elliptical or oblong, so when it is strung on a racket, its vertical and horizontal guts are the elliptical gently curved surface (6
) or if they intersect with each other at the oblong flat part (7), the contact area between the vertical and horizontal guts will increase, and the biting caused by tension will be significantly alleviated, and the contact friction force will be reduced. Since it is large, it has the effect of preventing the phenomenon of misalignment, and since it has a double coating layer and a resin coating is applied to the surface, it is highly durable, and is particularly suitable for use in hardball tennis.

4 to 7 show other embodiments for increasing the contact area between the guts.

That is, Fig. 4 shows a synthetic resin monofilament core (Ib) having an equilateral triangular cross section, which is coated with a thin synthetic resin monofilament (2) (2) (2) spirally wound around the outer periphery of a synthetic resin monofilament core wire (Ib) having an equilateral triangular cross section. Fig. 5 shows an embodiment in which a string (5) is formed by applying a resin coating (4), and FIG. 2. The part is triangular with a rounded shape. The above embodiment and Inj are placed on the outer periphery.
Thin synthetic resin monofilament at tA) (2) (2)
This shows an embodiment in which a resin coating (4) is applied after all the turns have been covered to form a string (5).

Furthermore, Fig. 6 shows a thin synthetic resin monofilament (
2) It shows an embodiment in which (2) is wound spirally and coated with a resin coating (4) to form a gut (5) with a square cross section. A resin monofilament core wire (1eH1θ) is integrated with an adhesive (3a) to form a rectangular core material with rounded corners.
As in each of the above embodiments, the outer periphery is covered with a thin synthetic resin monofilament (2) (2) and a resin coating (4) is applied to form a gut (5).

Although not shown in the drawings, the object of the present invention can be achieved even if the cross-sectional shape of the gut is polygonal, such as pentagonal or hexagonal, in addition to the illustrated cross-sectional shape. It is possible to obtain a contact area that is larger than the contact area of the mutual guts at the intersection of the conventional guts having a substantially perfect circular cross-sectional shape, and has a tensile strength equal to or higher than that of the conventional guts. The present invention can be satisfied if the gut has approximately the same cross-sectional area and apparent thickness as the gut.

As described above, the gas sheet according to the present invention has approximately the same cross-sectional area and apparent thickness as a general-purpose gas sheet with a substantially perfect circular cross section, and is made of a single or composite material of high-strength synthetic resin monofilament. Since the racket has a non-perfect circular cross-section, when a string is attached to the racket,
The contact area at the intersection of the vertical and horizontal guts is larger than that of conventional gutts, which have a substantially perfect circular cross section. Therefore, the mutual bite between the guts at the intersection is significantly alleviated, and the phenomenon of misalignment is prevented. In addition to this, the unexpected situation during use in which the gut is broken at the intersection due to the instantaneous impact when the ball is hit is effectively prevented, and the durability is significantly improved. Furthermore, although the cross-sectional area is almost the same as that of conventional gutts, its cross-sectional shape is not a perfect circle, so the longest linear dimension across the cross section is inevitably larger than that of conventional gutts. The surface of the longest part comes into strong pressure contact with the inner surface of the insertion hole, which increases the tension holding force of the string and helps prevent loosening, which is a useful effect in practice.

4. Explanation of Drawing No. 71i The drawings show an embodiment of the present invention, in which Fig. 1 is a partial perspective view of a gut with an elliptical cross section, Fig. 2 is a sectional view of Fig. 1, and Fig. 3 is a sectional view. 4 is a cross-sectional view of a gut with a triangular cross-section, FIG. 5 is a cross-sectional view of another embodiment of a gut with a triangular cross-section, and FIG. 6 is a cross-sectional view of a gut with a square MJt plane. A cross-sectional view, and FIG. 7 is a cross-sectional view showing another embodiment of the hJ+ blood square gut.

(1) (Ia) (1bH1c) (1d) (1e) are respectively synthetic resin monofilament core wire, (2) Gj thin synthetic resin monofilament core wire, (2) is thin synthetic resin monofilament), (3) (3a) is Adhesive, (4
) is resin coating, (5) is gutt.

Patent applicant Gosen Co., Ltd. Imabe 1 included Praise? :　ha　g5ha

Claims (1)

[Claims] It is formed from a single or composite material of a high-strength synthetic resin monofilament, and has an i11 plane; It has the same cross-sectional area and apparent thickness, and is characterized by having at least part of its surface a slightly curved or flat surface with a smaller curvature than the general-purpose gas sheet. An irregular cross section.